Warmflow Agentis External Heat Only Pumped Oil Boiler 15–44kW

Warmflow Agentis External Pumped

The Warmflow Agentis External Heat Only Pumped is a high-efficiency external oil-fired boiler designed for outdoor installation where reliable central-heating performance and a factory-fitted circulation pump are required.

The Agentis External Pumped range is available in four models: E21P, E26P, E33P and E44P, providing nominal heat-output ranges from approximately 15kW to 44kW. The range combines Warmflow’s patented heat-exchanger technology with a Riello low-NOx burner, factory-fitted Grundfos UPM3 FLEX AS circulating pump, weatherproof IP45-rated casing and a multi-directional flue supplied as standard.

15–44kW Output Range

The Warmflow Agentis External Pumped range provides four output configurations:

Warmflow’s technical information identifies the E21P, E26P, E33P and E44P models and gives the overall range as 15–44kW.

This makes the range suitable for different residential and higher-demand heating applications where an external oil boiler is preferred.

Factory-Fitted Grundfos Circulating Pump

A major feature distinguishing the Agentis External Pumped model from the standard External Heat Only version is the inclusion of a factory-fitted Grundfos UPM3 FLEX AS circulating pump.

The pre-fitted pump helps simplify the heating installation by integrating circulation equipment into the boiler package rather than requiring the pump to be sourced and installed separately.

External Oil Boiler with IP45 Casing

The Agentis External Pumped is specifically designed for outdoor installation.

The boiler is enclosed in an IP45-rated anthracite-grey weatherproof casing, providing protection for the appliance in external environments while eliminating the need for a conventional indoor boiler location. Warmflow describes the casing as a no-maintenance design.

The external configuration can help free valuable indoor space in kitchens, utility rooms and plant areas.

Warmflow Patented Heat Exchanger

The Agentis range incorporates Warmflow’s patented heat-exchanger technology, designed to provide efficient heat transfer while maintaining a compact boiler configuration.

Warmflow identifies its Agentis External range as using its high-efficiency heat-exchanger technology together with the latest Riello low-NOx burner technology.

Riello Low-NOx Burner

The Agentis External Pumped range uses the latest Riello low-NOx burner technology.

The burner is designed to provide efficient oil combustion while helping the appliance meet applicable emissions requirements. Warmflow specifically highlights the low-NOx technology across its Agentis external range.

Multi-Directional Flue Included

A multi-directional flue is supplied as standard with the Agentis External Pumped boiler.

This provides installers with additional flexibility when planning the boiler’s external flue arrangement. The precise flue configuration and installation requirements should always be checked against Warmflow’s current installation documentation.

HVO Ready

Warmflow identifies the Agentis External Pumped range as HVO Ready.

This makes the range relevant for customers considering lower-carbon liquid-fuel alternatives where HVO use is appropriate and permitted under the applicable installation and fuel requirements.

Quiet External Operation

Warmflow describes the Agentis External Pumped range as offering quiet operation, making it suitable for external installations where minimizing operating noise is important.

Heat-Only Boiler

The Agentis External Pumped is a heat-only oil boiler.

It should not be confused with Warmflow’s Agentis External Combi models, which are designed to provide domestic hot water as part of the appliance.

Likewise, the Pumped model should not be described as the Agentis External System version. Warmflow lists the External Heat Only, External Pumped, External System and External Combi configurations separately.

Warmflow Agentis External Pumped Specifications

Warmflow’s current product information confirms the 15–44kW range, Grundfos pump, IP45 casing, multi-directional flue and HVO-ready specification.

E21P, E26P, E33P and E44P Models

Warmflow Agentis E21P

The E21P covers approximately 15–21kW and is the smallest model in the Agentis External Pumped range. It is suited to heating installations requiring up to 21kW of nominal heat output.

Warmflow Agentis E26P

The E26P covers approximately 21–27kW, providing a higher output option for properties with greater heating demand.

Warmflow Agentis E33P

The E33P covers approximately 27–33kW, extending the range for larger residential heating requirements.

Warmflow Agentis E44P

The E44P provides approximately 33–44kW and is the highest-output model in the standard Agentis External Pumped range. Warmflow’s technical documentation lists the E44P at up to 44kW nominal heat output.

Why Choose the Warmflow Agentis External Pumped?

Key benefits include:

• 15–44kW output range
• Four model options
• Factory-fitted Grundfos UPM3 FLEX AS pump
• Riello low-NOx burner technology
• Warmflow patented heat exchanger
• IP45 weatherproof casing
• Multi-directional flue included
• Outdoor installation
• Quiet operation
• HVO-ready design
• Compact external installation solution

Frequently Asked Questions

What is the Warmflow Agentis External Pumped boiler?

It is an external, heat-only oil boiler with a factory-fitted Grundfos UPM3 FLEX AS circulating pump. The range consists of E21P, E26P, E33P and E44P models.

What output range does the Agentis External Pumped cover?

The range covers approximately 15–44kW, depending on the selected model.

What models are available?

The current range includes:

• E21P — 15–21kW
• E26P — 21–27kW
• E33P — 27–33kW
• E44P — 33–44kW

Is the Warmflow Agentis External Pumped a heat-only boiler?

Yes. It is an external heat-only oil boiler. It is separate from the Agentis External Combi and External System models.

Does it include a circulating pump?

Yes. The Pumped models have a factory-fitted Grundfos UPM3 FLEX AS circulating pump.

Is the boiler suitable for outdoor installation?

Yes. The Agentis External Pumped is specifically designed for external installation and uses an IP45-rated weatherproof casing.

Does it include a flue?

Yes. A multi-directional flue is included as standard.

What burner does the Agentis External Pumped use?

The boiler uses Riello low-NOx burner technology.

Is the Warmflow Agentis External Pumped HVO ready?

Yes. Warmflow identifies the Agentis External Pumped range as HVO Ready.

What is the difference between Agentis External Heat Only and External Pumped?

The standard Agentis External Heat Only range is E21, E26, E33 and E44. The External Pumped range uses E21P, E26P, E33P and E44P and adds a factory-fitted Grundfos UPM3 FLEX AS circulating pump.

Is the Pumped model a system boiler?

No. Do not confuse it with the separate Agentis External System range. The Pumped model is a heat-only boiler with an integrated circulating pump.

Is the Warmflow Agentis External Pumped a combi boiler?

No. The External Combi is a separate Warmflow configuration. The Agentis External Pumped is a heat-only boiler.

Is the Warmflow Agentis External Pumped suitable for European heating projects?

EuroFuelSupply offers heating and energy products for customers across supported European markets. Availability, selected output, installation requirements and delivery should be confirmed before ordering.